Run results for: setFont measureText OffscreenCanvas vs Canvas - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Canvas textBaseline

17.3M/s

Offscreen textBaseline

14.0M/s

Offscreen font

13.6M/s

Offscreen textAlign

13.3M/s

Canvas textAlign

13.1M/s

Canvas font

7.8M/s

Canvas

1.7M/s

Offscreen

1.7M/s

View exact numbers

Test name	Executions per second
✓ Canvas textBaseline	17,271,520 Ops/sec
Offscreen textBaseline	13,953,469 Ops/sec
Offscreen font	13,615,177 Ops/sec
Offscreen textAlign	13,298,433 Ops/sec
Canvas textAlign	13,065,849 Ops/sec
Canvas font	7,774,120 Ops/sec
Canvas	1,714,959 Ops/sec
Offscreen	1,668,086 Ops/sec

Script Preparation code:

var canvas = document.createElement('canvas');
var context = canvas.getContext('2d');

var offscreenCanvas = new OffscreenCanvas(0, 0);
var offscreenContext = offscreenCanvas.getContext('2d');

Tests:

Canvas
context.measureText('M');
Offscreen
offscreenContext.measureText('M');
Canvas font
context.font = 'bold 48px serif';
Offscreen font
offscreenContext.font = 'bold 48px serif';
Canvas textBaseline
context.textBaseline = "hanging";
Offscreen textBaseline
offscreenContext.textBaseline = "hanging";
Canvas textAlign
context.textAlign = "center";
Offscreen textAlign
offscreenContext.textAlign = "center";